Portable audio system



FIG. 1 is a perspective view of a portable audio system as seen from the front, top and side;

FIG. 2 is a perspective view thereof as seen from the back, bottom and opposite side;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a side view thereof; and,

FIG. 8 is an opposite side view thereof.

The dotted line portions of the drawings represent environmental structure only and form no part of the claimed design. 

CLAIM The ornamental design for a portable audio system, substantially as shown and described. 